/***************************************************************************
 *   Copyright (C) 2010 by Oleg Goncharov  *
 *   $EMAIL$                           *                          
 *                                                                         *
 *   This file is part of ChessVision.                                     *
 *                                                                         *
 *   ChessVision is free software; you can redistribute it and/or modify   *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 *   This program is distributed in the hope that it will be useful,       *
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
 *   GNU General Public License for more details.                          *
 *                                                                         *
 *   You should have received a copy of the GNU General Public License     *
 *   along with this program; if not, write to the                         *
 *   Free Software Foundation, Inc.,                                       *
 *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
 ***************************************************************************/
#include <opencv/cv.h>
#include <opencv/highgui.h>

#include "cpointcirclecenter.h"

bool CPointCircleCenter::DetectPoint(const IplImage* img, cv::Point2f& point) {
	IplImage * grey = cvCreateImage(cvGetSize(img), IPL_DEPTH_8U, 1);
	IplImage * grad = cvCreateImage(cvGetSize(img), IPL_DEPTH_8U, 1);
	CvPoint min_loc;
	int ncircles;
	
	cvCvtColor(img, grey, CV_BGR2GRAY);
	
	CvMemStorage* storage = cvCreateMemStorage(0);
	CvSeq* circles = cvHoughCircles( grad, storage, CV_HOUGH_GRADIENT, 1, 1, p1, p2, 30);
	
	point.x = 0;
	point.y = 0;
	ncircles = MIN(max_circles, circles->total);
	for(int i = 0; i < ncircles; i++ ) {
		float* p = (float*)cvGetSeqElem( circles, i );
        //cvCircle( img, cvPoint(cvRound(p[0]),cvRound(p[1])), cvRound(p[2]), CV_RGB(255,0,0), 3, 8, 0 );
		point.x += p[0]; 
		point.y += p[1];
	}
	if (ncircles) {
		point.x /= ncircles;
		point.y /= ncircles;
	}
	
	cvReleaseImage(&grey);
	cvReleaseMemStorage(&storage);
	
	return ncircles;
}

